How to inform a QTableView about changes in the underlying QAbstractTablemodel?

[olidem]

Hi!

I'm developing a customer library. I have a model and a view class:

class CustomerLibrary : public QAbstractTableModel
{
//...
public slots:
    void setSeachString (const QString & str){
        _vec_restricted.clear();
        foreach(Customer * c, _vec_all)
            if(c->contains(str)) _vec_restricted.append(c);
    }
private:
    QVector<Customer*> _vec_all;
    QVector<Customer*> _vec_restricted;
}
class CustomerTableView : public QTableView
{
//...
}

class CustomerLibrary : public QAbstractTableModel
{
//...
public slots:
    void setSeachString (const QString & str){
        _vec_restricted.clear();
        foreach(Customer * c, _vec_all)
            if(c->contains(str)) _vec_restricted.append(c);
    }
private:
    QVector<Customer*> _vec_all;
    QVector<Customer*> _vec_restricted;
}
class CustomerTableView : public QTableView
{
//...
}

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Ok, in order to find quickly an entry, I have a LineEdit whose textChanged signal is connected to the setSearchString(...) method.

So anytime the text changes, drastic changes happen to my model.

How can I inform the view that an update is necessary?
Also I do not want to remove the rows one by one.

Thnaks in advance,
Olli

[faldzip]

take a look at QAbstractItemModel::dataChanged() signal or maybe in your case QAbstractItemModel::reset() method would be better.

[olidem]

Hi!

Thanks for your reply.
The questio I have is on what data the dataChanged signal refers.
Lots of "rows" in my library can disappear and lots can appear.

Eg if I had all entries before and now select only those containing the letter S, what shall I signal then? A dataChanged on all non-S-entires?

[faldzip]

if you insert rows or remove them there are signals for that: QAbstractItemModel::rowsInserted() and QAbstractItemModel::rowsRemoved(). And when you are for example inserting rows then you are emmiting rowsAboutToBeInserted then isert them and then emit rowsInserted. Please refer to Qt Examples & Demos and Qt Assistant, where whole item's change, insertion an removal is expalind clear.

[olidem]

Thank you for your replies so far.

I have (temporarily) solved the problem for now by simply calling QAbstractTabelModel::reset(). I will have to come back to this problem eventually later when dealing with more than a only few example customer datas.

Thank you all!